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Posted by Elaine Moore Sep 24, 2007 |
For immune system health, consider adding more onions to your diet. Onions are considered one of the top immune system superfoods because of their high concentrations of bioflavinoids and their abundance of compounds rich in the element sulfur. These qualities help strengthen the immune system without stimulating it. In autoimmune diseases, the immune system is weak and ineffective.
Bioflavinoid Constituents
Onions are rich in the bioflavinoid phytonutrients curcumin and quercetin. The combination of these bioflavinoids is effective in reducing oxidative stress. Oxidative stress is known to trigger autoimmune disease development and contribute to disease flares.
Nutrients
In addition to having a rich bioflavinoids content, onions are rich sources of sulfur, vitamin c, potassium, folic acid, zinc, selenium and fiber. Onions are also fat-free, cholesterol-free and low in sodium. The nutrient content of onions is highest when onions are ripe, raw, and freshly picked and declines during storage. Onions that have developed sprouts or soft spots should be discarded. Sweet summer onions are best stored refrigerated whereas yellow, white, and red onions are best when stored in an open-air container such as a hanging wire basket. Onions should be stored away from moisture and away from potatoes. Once onions have been cut, the nutrients escape through oxidation even when the remaining onion is tightly wrapped.
Health Benefits
Studies show that onions support cardiovascular health, help prevent diabetes and atherosclerosis and reduce the risk of colon and stomach cancers. Studies suggest that onions may also protect against high blood pressure. Onions, which have been used medicinally since ancient Egyptian times, also have reputed antibacterial, antiseptic, and antifungal properties. During wars, onions have been used topically to promote wound healing.
Resource:
Trish Riley, The Healthy Onion, Helping to Fight Cancer and Cardiovascular Disease, Life Extension, October 2007, 93-6.